Domestic Hot Water Tank Installation Configuration; Initial Start-Up At Low Outdoor Ambient Temperatures; Pre-Operation Checks; Checks Before Initial Start-Up - Daikin EBHQ006BAV3 Installation Manual

13.4. Domestic hot water tank installation
configuration
When no domestic hot water tank is
installed, toggle switch SS2-2 should be set to
OFF (default).
When a domestic hot water tank is installed,
toggle switch SS2-2 should be set to ON.
CAUTION
When SS2-3 was set to ON without all necessary and
correct wiring connections between indoor unit and switch
box of the domestic hot water tank, the error code AC will
be displayed on the user interface.
13.5. Initial start-up at low outdoor ambient
temperatures
During initial start-up and when water temperature is low, it is
important that the water is heated gradually. Failure to do so may
result in cracking of concrete floors due to rapid temperature change.
Please contact the responsible cast concrete building contractor for
further details.
To do so, the lowest leaving water set temperature can be decreased
to a value between 15°C and 25°C by adjusting the field setting
[9-01] (heating set point lower limit). Refer to "13.9. Field settings" on
page 31.
CAUTION
Heating between 15°C and 25°C is performed by the
backup heater only (EKMBUH unit).

13.6. Pre-operation checks

Checks before initial start-up

DANGER
Switch off all relevant power supply before making any
connections.
After the installation of the unit, check the following before switching
on the circuit breaker:
1 Field wiring
Make sure that the field wiring between local supply panel and
indoor unit, outdoor unit and indoor unit, indoor unit and backup
heater kit, indoor unit and valves (when applicable), indoor unit
and room thermostat (when applicable), and indoor unit and
domestic hot water tank has been carried out according to the
instructions described in the chapter "12. Electrical wiring work"
on page 21, according to the wiring diagrams and according to
European and national regulations.
2 Fuses or protection devices
Check that the fuses or the locally installed protection devices
are of the size and type specified in the chapter "Technical
specifications" on page 47. Make sure that neither a fuse nor a
protection device has been bypassed.
3 Backup heater circuit breaker F1B/F3B
Do not forget to turn on the backup heater circuit breaker F2B in
the switch box (F1B/F3B depends on the backup heater type) of
EKMBUH. Refer to the wiring diagram.
4 Booster heater circuit breaker F2B
Do not forget to turn on the booster heater circuit breaker F2B in
the control box (applies only to units with optional domestic hot
water tank installed).
Installation manual
30
5 Earth wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
6 Internal wiring
1 2 3 4
Visually check the switch box on loose connections or damaged
electrical components.
7 Fixation
Check that the unit is properly fixed, to avoid abnormal noises
1 2 3 4
and vibrations when starting up the unit.
8 Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
9 Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local dealer.
10 Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
11 Air purge valve
Make sure the air purge valve is open (at least 2 turns).
12 Pressure relief valve
Check if the backup heater is completely filled with water by
operating the pressure relief valve. It should purge water instead
of air.
NOTICE
Operating the system with the backup heater not
completely filled with water will damage the backup heater!
13 Shut-off valves
Make sure that the shut-off valves are correctly installed and
fully open.
NOTICE
Operating the system with closed valves will damage the
pump!

13.7. Powering up the indoor unit

When power supply to the outdoor unit is turned on (provided power
supply via the outdoor unit) , "88" is displayed on the user interface
during its initialisation, which might take up to 30 seconds. During
this process the user interface cannot be operated.

13.8. Setting the pump speed

The pump speed can be selected on the pump (see "5.2. Main
components of the outdoor unit and the indoor unit" on page 6).
The default setting is high speed (III). If the water flow in the system
is too high (e.g., noise of running water in the installation) the speed
can be set to medium speed (II) or low speed (I).
The available external static pressure (ESP, expressed in kPa) in
function of the water flow (l/min) is shown in the graph below.
70
60
50
40
III
30
II
20
I
10
0
12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42
[ l/min ]
EBHQ006+008BAV3 + EKCBX/H008BAV3
Unit for air to water heat pump system
4PW64602-1A – 09.2010